Two methods for apache+php to perfectly solve 301 redirect

Two methods for apache+php to perfectly solve 301 redirect_PHP tutorial

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Release： 2016-07-21 15:28:15

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Fortunately, 301 redirection can effectively solve this problem. As mentioned in this article on the Moonlight Blog,
301 redirection can promote search engine optimization effects
From the perspective of search engine optimization, 301 redirection is the most feasible way to redirect URLs. When the domain name of a website changes, the search engine will only index the new URL, and at the same time, it will transfer all the original external links under the old address to the new address, so that the website's ranking will not be affected due to the URL change. No impact at all. Similarly, when using the 301 permanent redirect command to point multiple domain names to the main domain of the website, it will not have any negative impact on the ranking of the website.

For more information about 301 redirection, you may wish to Google it. This article only introduces the implementation method!
I have written a related article before about the implementation of 301 redirection, but the solution in this article is relatively simple and can only realize the jump of the homepage. The two methods introduced in this article can perfectly realize 301 Redirect.

Method 1: Modify the .htaccess file
with the following code:

Copy the code with the following code:

 
 
RewriteEngine On 
RewriteCond %{HTTP_HOST} blog.iflyhigher.tk$ [NC] 
RewriteRule ^(.*)$ http://blog.jb51.net/ $1 [R=301,L] 
RewriteCond %{HTTP_HOST} iflyhigher.tk$ [NC] 
RewriteRule ^(.*)$ http://jb51.net/$1 [R=301,L] 
RewriteCond %{HTTP_HOST} moiya.tk$ [NC] 
RewriteRule ^(.*)$ http://jb51.net/$1 [R=301,L] 
 

This blog needs to redirect three domain names, so I have to write a lot. The key code is 2 sentences

Copy code The code is as follows:

 
RewriteCond %{HTTP_HOST} blog.iflyhigher.tk$ [NC] 
RewriteRule ^(.*)$ http://blog.jb51.net/$1 [R= 301,L] 

The red domain name is the old domain name that needs to be redirected, and the green one is the domain name of the current website.
Method 2: Use PHP redirection code
Create a new index.php file, and then refer to the following code to make simple modifications according to your own redirection requirements:

Copy the code The code is as follows:

 
$the_host = $_SERVER['HTTP_HOST']; 
$request_uri = isset($_SERVER['REQUEST_URI' ]) ? $_SERVER['REQUEST_URI'] : ''; 
switch ($the_host) 
{ 
case "www.iflyhigher.tk": 
case "iflyhigher.tk": 
$location = "Location: http://jb51.net" . $request_uri; 
break; 
case "blog.iflyhigher.tk": 
$location = "Location: http://blog .jb51.net" . $request_uri; 
break; 
case "www.moiya.tk": 
case "moiya.tk": 
$location = "Location: http://jb51 .net"; 
break; 
default: 
$location = "Location: http://jb51.net"; 
break; 
} 
header('HTTP/1.1 301 Moved Permanently'); 
header($location); 
exit(); 
?> 

If you only need to redirect one domain name, you can simplify the code into the following form:

Copy code The code is as follows:

 
$the_host = $_SERVER[ 'HTTP_HOST'];//Get the entered domain name
$request_uri = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '';//Judge the following request part
if($the_host !== 'jb51.net')//jb51.net is my current domain name
{ 
header('HTTP/1.1 301 Moved Permanently');//Issue 301 header
header('Location: http://jb51.net'.$request_uri);//Jump to my new domain name address
exit(); 
} 
?> 
 

Note that the final exit() function must be written. I didn’t write it initially. As a result, it can only redirect the home page. Web pages like http://blog.iflyhigher.tk/guestbook cannot be redirected. Orientation.
Finally, some details about redirection
Since three domain names need to be redirected, before redirection, I first bind these three domain names to my server as Addon Domain, and let these three domain names be redirected. Two domain names point to the same folder. In this way, you only need to modify the .htaccess file or index.php file in this folder. If there is no .htaccess file or index.php file, just create a new one.
I hope this article will be helpful to friends who need to perform 301 redirection.
Please indicate the source for reprinting: Gevin’s blog